.pxToRem(@p, @px) {
    @{p}: @px / 75px * 1rem;
}
.header{
     position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
    .pxToRem(height,80);
    background: #FFFFFF;
    .pxToRem(font-size,28);
}
.box{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    .pxToRem(padding-top,15);
    .sp{
        width: 96%;
        display: flex;
        justify-content: center;
        align-items: center;
        img{
            width: 100%;
        }
    }
}

